--- /dev/null
+/* Subroutines for the gcc driver.
+ Copyright (C) 2006 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GCC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING. If not, write to
+the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+Boston, MA 02110-1301, USA. */
+
+#include "config.h"
+#include "system.h"
+#include <stdlib.h>
+
+#ifndef CROSS_COMPILE
+/* This file shouldn't even be included in a cross compiler, but
+ let's be sure. */
+extern const char *host_detect_local_cpu (int argc, const char **argv);
+
+#ifdef GCC_VERSION
+#define cpuid(num,a,b,c,d) \
+ asm volatile ("xchgl %%ebx, %1; cpuid; xchgl %%ebx, %1" \
+ : "=a" (a), "=r" (b), "=c" (c), "=d" (d) \
+ : "0" (num))
+
+#define bit_CMPXCHG8B (1 << 8)
+#define bit_CMOV (1 << 15)
+#define bit_MMX (1 << 23)
+#define bit_SSE (1 << 25)
+#define bit_SSE2 (1 << 26)
+
+#define bit_SSE3 (1 << 0)
+#define bit_CMPXCHG16B (1 << 13)
+
+#define bit_3DNOW (1 << 31)
+#define bit_3DNOWP (1 << 30)
+#define bit_LM (1 << 29)
+
+/* This will be called by the spec parser in gcc.c when it sees
+ a %:local_cpu_detect(args) construct. Currently it will be called
+ with either "arch" or "tune" as argument depending on if -march=native
+ or -mtune=native is to be substituted.
+
+ It returns a string containing new command line parameters to be
+ put at the place of the above two options, depending on what CPU
+ this is executed. E.g. "-march=k8" on an AMD64 machine
+ for -march=native.
+
+ ARGC and ARGV are set depending on the actual arguments given
+ in the spec. */
+const char *host_detect_local_cpu (int argc, const char **argv)
+{
+ const char *cpu = "i386";
+ unsigned int eax, ebx, ecx, edx;
+ unsigned int max_level;
+ unsigned int vendor;
+ unsigned int ext_level;
+ unsigned char has_mmx = 0, has_3dnow = 0, has_3dnowp = 0, has_sse = 0;
+ unsigned char has_sse2 = 0, has_sse3 = 0, has_cmov = 0;
+ unsigned char has_longmode = 0;
+ unsigned char is_amd = 0;
+ unsigned int family = 0;
+ if (argc < 1
+ || (strcmp (argv[0], "arch")
+ && strcmp (argv[0], "tune")))
+ return NULL;
+
+#ifndef __x86_64__
+ /* See if we can use cpuid. */
+ asm volatile ("pushfl; pushfl; popl %0; movl %0,%1; xorl %2,%0;"
+ "pushl %0; popfl; pushfl; popl %0; popfl"
+ : "=&r" (eax), "=&r" (ebx)
+ : "i" (0x00200000));
+
+ if (((eax ^ ebx) & 0x00200000) == 0)
+ goto done;
+#endif
+
+ cpu = "i586";
+
+ /* Check the highest input value for eax. */
+ cpuid (0, eax, ebx, ecx, edx);
+ max_level = eax;
+ /* We only look at the first four characters. */
+ vendor = ebx;
+ if (max_level == 0)
+ goto done;
+
+ cpuid (1, eax, ebx, ecx, edx);
+ has_cmov = !!(edx & bit_CMOV);
+ has_mmx = !!(edx & bit_MMX);
+ has_sse = !!(edx & bit_SSE);
+ has_sse2 = !!(edx & bit_SSE2);
+ has_sse3 = !!(ecx & bit_SSE3);
+ /* We don't care for extended family. */
+ family = (eax >> 8) & ~(1 << 4);
+
+ cpuid (0x80000000, eax, ebx, ecx, edx);
+ ext_level = eax;
+ if (ext_level >= 0x80000000)
+ {
+ cpuid (0x80000001, eax, ebx, ecx, edx);
+ has_3dnow = !!(edx & bit_3DNOW);
+ has_3dnowp = !!(edx & bit_3DNOWP);
+ has_longmode = !!(edx & bit_LM);
+ }
+
+ is_amd = vendor == *(unsigned int*)"Auth";
+
+ if (is_amd)
+ {
+ if (has_mmx)
+ cpu = "k6";
+ if (has_3dnow)
+ cpu = "k6-3";
+ if (has_3dnowp)
+ cpu = "athlon";
+ if (has_sse)
+ cpu = "athlon-4";
+ if (has_sse2 || has_longmode)
+ cpu = "k8";
+ }
+ else
+ {
+ if (family == 5)
+ {
+ if (has_mmx)
+ cpu = "pentium-mmx";
+ }
+ else if (has_mmx)
+ cpu = "pentium2";
+ if (has_sse)
+ cpu = "pentium3";
+ if (has_sse2)
+ {
+ if (family == 6)
+ /* It's a pentiumpro with sse2 --> pentium-m */
+ cpu = "pentium-m";
+ else
+ /* Would have to look at extended family, but it's at least
+ an pentium4 core. */
+ cpu = "pentium4";
+ }
+ if (has_sse3)
+ {
+ if (has_longmode)
+ cpu = "nocona";
+ else
+ cpu = "prescott";
+ }
+ }
+
+done:
+ return concat ("-m", argv[0], "=", cpu, NULL);
+}
+#else
+/* If we aren't compiling with GCC we just provide a minimal
+ default value. */
+const char *host_detect_local_cpu (int argc, const char **argv)
+{
+ return concat ("-m", argv[0], "=i386", NULL);
+}
+#endif
+#endif
#define OPTIMIZATION_OPTIONS(LEVEL, SIZE) \
optimization_options ((LEVEL), (SIZE))
+/* -march=native handling only makes sense with a native compiler. */
+#ifndef CROSS_COMPILE
+/* In driver-i386.c. */
+extern const char *host_detect_local_cpu (int argc, const char **argv);
+#define EXTRA_SPEC_FUNCTIONS \
+ { "local_cpu_detect", host_detect_local_cpu },
+#endif
+
/* Support for configure-time defaults of some command line options. */
#define OPTION_DEFAULT_SPECS \
{"arch", "%{!march=*:-march=%(VALUE)}"}, \
/* Specs for the compiler proper */
#ifndef CC1_CPU_SPEC
-#define CC1_CPU_SPEC "\
+#define CC1_CPU_SPEC_1 "\
%{!mtune*: \
%{m386:mtune=i386 \
%n`-m386' is deprecated. Use `-march=i386' or `-mtune=i386' instead.\n} \
%n`-mintel-syntax' is deprecated. Use `-masm=intel' instead.\n} \
%{mno-intel-syntax:-masm=att \
%n`-mno-intel-syntax' is deprecated. Use `-masm=att' instead.\n}"
+
+#ifdef CROSS_COMPILE
+#define CC1_CPU_SPEC CC1_CPU_SPEC_1
+#else
+#define CC1_CPU_SPEC CC1_CPU_SPEC_1 \
+"%{march=native:%<march=native %:local_cpu_detect(arch)} \
+%{mtune=native:%<mtune=native %:local_cpu_detect(tune)}"
+#endif
#endif
\f
/* Target CPU builtins. */
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